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CCDB → Angiosperms → Compositae → Silphium → Silphium radula var. radula
| Name | Accepted Name | Gametophytic(n) | Sporophytic(2n) | Data Source | reference | ||
| Silphium radula var. radula | Silphium radula Nutt. | 7(1) | Asteracea | Fisher & C. 1962 Ohio J. Sci. | |||
| Silphium radula var. radula | Silphium radula Nutt. | 14(1) | Asteracea | Zhao 1996 Sida (= J. Bot. Res. Inst. Texas) | |||
| Silphium radula var. radula | Silphium radula Nutt. | 14 | eFlora |